How long does an Agile Transformation takes?

This depends on many factors, including how big your organization is, how closely aligned you are with Agile currently, how many resources you are willing to commit to this, and whether you have an experienced team to guide you through the transformation process.

From my experience leading about 30 Agile Transformation cases, here is the rough estimate you can refer to based on your company's size:

• 30 people or less: visible result in three months. End-to-end transformation in about 6 months
• 200 people or less: This will be a 2-stage transformation. First, you should pilot a project of 30 people, which needs the same time as mentioned above. Then, you continue to transform more teams. The End-to-end transformation in about 2 years.
• >Over 1000 people: This will be a 3-stage transformation. We should be able to do the 30 people and 200 people cases first and enjoy some success. After that, we will extend our coverage gradually. For an organization this big, it is hard to do end-to-end transformation. You will usually hit satisfactory coverage in 2-5 years.